公开(公告)号：US11341996B2

公开(公告)日：2022-05-24

申请号：US17152196

申请日：2021-01-19

Applicant: Amethystum Storage Technology Co., Ltd.

Inventor： Mu Zheng ,  Tiewei Luo ,  Jun Tian ,  Dejiao Hu ,  Yicheng Liu

IPC: G11B7/0065 ,  G11B7/007

Abstract: According to a positioning method for a hologram in a disk-type holographic storage medium, a guide groove is formed in advance in the disk-type storage medium and is scribed with a positioning marker that includes index information, position information and crossing angle information. The positions of a positioning laser beam and a recording/reproducing laser beam are applied to the same medium position. When an optical head accesses a recording/reading position at a high speed, the shift multiplex recording/reading is performed starting from a marker position. A servo system controls the laser beams to move along the guide groove and ensures that a focused beam is focused on the medium. According to the method, the position and angular information can be quickly positioned in process of performing cross-shift multiplex recording/reading, the recording/reading speed of the system is improved, and random access is achieved.

公开(公告)号：US20210225400A1

公开(公告)日：2021-07-22

申请号：US17152196

申请日：2021-01-19

Applicant: Amethystum Storage Technology Co., Ltd.

Inventor： Mu ZHENG ,  Tiewei LUO ,  Jun TIAN ,  Dejiao HU ,  Yicheng LIU

IPC: G11B7/0065 ,  G11B7/007

Abstract: According to a positioning method for a hologram in a disk-type holographic storage medium, a guide groove is formed in advance in the disk-type storage medium and is scribed with a positioning marker that includes index information, position information and crossing angle information. The positions of a positioning laser beam and a recording/reproducing laser beam are applied to the same medium position. When an optical head accesses a recording/reading position at a high speed, the shift multiplex recording/reading is performed starting from a marker position. A servo system controls the laser beams to move along the guide groove and ensures that a focused beam is focused on the medium. According to the method, the position and angular information can be quickly positioned in process of performing cross-shift multiplex recording/reading, the recording/reading speed of the system is improved, and random access is achieved.

公开(公告)号：US20210225398A1

公开(公告)日：2021-07-22

申请号：US17135159

申请日：2020-12-28

Applicant: Amethystum Storage Technology Co., Ltd.

Inventor： Mu ZHENG ,  Tiewei LUO ,  Jun TIAN ,  Dejiao HU ,  Yicheng LIU

IPC: G11B7/0065 ,  G11B7/085 ,  G03H1/00 ,  G03H1/26

Abstract: The present invention relates to a method for accurately detecting and controlling a position of an optical head. According to the present invention, by utilizing the narrow shift selectivity of a spherical reference beam shift multiplexing technology, a control area that includes an x-direction position control unit and a y-direction position control unit and that is separated from a data area is formed in a storage medium. Like the data area, holograms of special patterns are recorded in the control area, when the data is read, information in the control area is read first, and the position of the optical head relative to the hologram in the data area can be detected in the x direction and the y direction respectively according to the information read by the hologram in the control area, so that reference light is controlled to the correct position shown by the address.

公开(公告)号：US20210201948A1

公开(公告)日：2021-07-01

申请号：US17135113

申请日：2020-12-28

Applicant: Amethystum Storage Technology Co., Ltd.

Inventor： Mu ZHENG ,  Tiewei LUO ,  Jun TIAN ,  Dejiao HU ,  Yicheng LIU

IPC: G11B7/0065 ,  G11B7/08 ,  G11B7/1395 ,  G11B7/1372 ,  G11B7/1381

Abstract: The present invention relates to a holographic data storage device with a single-arm structure, and belongs to the technical field of optical holographic storage. According to the device disclosed in the present invention, a part of a reference arm and a part of a signal arm are integrated together to form a single-arm structure, which can not only reduce the number of optical and mechanical elements, but also reduce the system volume and cost without degrading performance. In addition, a signal beam and a reference beam share the same relay lens, so that the impact of environmental interference on the two beams is equal, and the stability of the entire system is improved.

公开(公告)号：US09812162B2

公开(公告)日：2017-11-07

申请号：US15508109

申请日：2015-02-10

Applicant: AMETHYSTUM STORAGE TECHNOLOGY CO., LTD.

Inventor： Tiewei Luo

IPC: G11B17/22 ,  G11B33/04 ,  G11B17/24 ,  G06F3/06

CPC classification number: G11B17/226 ,  G06F3/0686 ,  G11B17/24 ,  G11B17/26 ,  G11B33/0466

Abstract: An opening and closing device comprises a disc tray, a mounting shaft and a jukebox manipulator. The disc tray is mounted on the mounting shaft. A positioning structure is provided between the disc tray and the mounting shaft. The mounting shaft is mounted on an outer circumference of a jukebox rotating cage. The jukebox manipulator is mounted on a manipulator driving unit. A side of the manipulator driving unit is provided with an optical drive, the jukebox manipulator is provided with a driving plate structure and the disc tray is provided with a driving lever. When the jukebox rotating cage rotates, the disc tray can revolve around the rotating shaft of jukebox rotating cage and can rotate around the mounting shaft. With the assistance of in-place bumping post which is provided by a side of the jukebox rotating cage, the positioning structure can locate the rotation of disc tray at a fixed static angle.

公开(公告)号：US20170287519A1

公开(公告)日：2017-10-05

申请号：US15508109

申请日：2015-02-10

Applicant: AMETHYSTUM STORAGE TECHNOLOGY CO., LTD.

Inventor： Tiewei LUO

IPC: G11B17/22 ,  G11B33/04

CPC classification number: G11B17/226 ,  G06F3/0686 ,  G11B17/24 ,  G11B17/26 ,  G11B33/0466

Abstract: An opening and closing device comprises a disc tray, a mounting shaft and a jukebox manipulator. The disc tray is mounted on the mounting shaft. A positioning structure is provided between the disc tray and the mounting shaft. The mounting shaft is mounted on an outer circumference of a jukebox rotating cage. The jukebox manipulator is mounted on a manipulator driving unit. A side of the manipulator driving unit is provided with an optical drive, the jukebox manipulator is provided with a driving plate structure and the disc tray is provided with a driving lever. When the jukebox rotating cage rotates, the disc tray can revolve around the rotating shaft of jukebox rotating cage and can rotate around the mounting shaft. With the assistance of in-place bumping post which is provided by a side of the jukebox rotating cage, the positioning structure can locate the rotation of disc tray at a fixed static angle.

公开(公告)号：US20220343947A1

公开(公告)日：2022-10-27

申请号：US17725665

申请日：2022-04-21

Applicant: Amethystum Storage Technology Co., Ltd.

Inventor： Dejiao HU ,  Yicheng LIU ,  Jun TIAN

IPC: G11B7/1395 ,  G11B7/085 ,  G11B7/0065

Abstract: A multi-channel multiplexing method for a disc storage medium includes: S1) recording holograms at holographic positioning marks of the storage medium by a reference light beam and a signal light beam, S2) rotating the storage medium in a circumferential direction and repeatedly performing step S1 until the holograms have been recorded at all the holographic positioning marks on optical tracks, S3) translating the storage medium to switch an optical head to another optical track, S4) repeating steps S1-S3 until recording of one cross channel is completed, S5) changing a relative angle of the center of the storage medium with respect to the optical head, and repeating steps S1-S4 to complete recording of another cross channel, S6) repeating steps S1-S5 until recording of all cross channels is completed, and S7) reproducing the holograms at any channel or recording position of the storage medium by using the same beam of reference light.

公开(公告)号：US11335370B2

公开(公告)日：2022-05-17

申请号：US17152490

申请日：2021-01-19

Applicant: Amethystum Storage Technology Co., Ltd.

Inventor： Mu Zheng ,  Tiewei Luo ,  Jun Tian ,  Dejiao Hu ,  Yicheng Liu

IPC: G11B7/0065

Abstract: The invention relates to a positioning method and device for a hologram in a card-type holographic storage medium, which can be used for beam positioning of cross-shift multiplexing and belong to the technical field of optical holographic storage. A guide groove in a grid shape is engraved on a card-type storage medium, and is provided with positioning markers. Each marker includes position information and direction information, can control an optical head to move along the guide groove, and shift multiplexing/reproducing is performed when recognizing the positioning markers. Since the card-type medium is adopted, a 90-degree rotation can be executed three times, and a total of four times of shift multiplex recording is performed. Random access can be achieved even in a medium that is rotated and used by adopting the positioning method and device described in the present invention.

公开(公告)号：US11308988B2

公开(公告)日：2022-04-19

申请号：US17135287

申请日：2020-12-28

Applicant: Amethystum Storage Technology Co., Ltd.

Inventor： Mu Zheng ,  Tiewei Luo ,  Jun Tian ,  Dejiao Hu ,  Yicheng Liu

IPC: G11B7/0065 ,  H04N5/89 ,  G11B7/08 ,  G03H1/26

Abstract: A holographic multiplexed recording method for increasing storage capacity is disclosed. In a holographic recording and reproducing device, the moving direction of a storage medium is not coplanar with the plane where the optical axes of signal light and reference light are located, or the relative moving direction of the storage medium and the signal light or the reference light is not coplanar with the plane where the optical axes of the signal light and the reference light are located. Through the method, a certain angle exists between the grating vector direction and the moving direction or the relative moving direction, so that the phenomenon that the grating vector directions are the same does not occur when the medium is subjected to multiplexed recording after being rotated or flipped. Not only is multiplexing number increased, but also crosstalk caused by the same grating vector direction is prevented.

公开(公告)号：US11232814B2

公开(公告)日：2022-01-25

申请号：US17152170

申请日：2021-01-19

Applicant: Amethystum Storage Technology Co., Ltd.

Inventor： Mu Zheng ,  Tiewei Luo ,  Jun Tian ,  Dejiao Hu ,  Yicheng Liu

IPC: G11B7/0065 ,  G03H1/26 ,  G11B7/08

Abstract: The present patent relates to a parallel reproducing holographic disk reading method and device, and belongs to the technical field of optical holographic storage. According to an angle-shift multiplexing method included in the present patent, multiplex recording is performed by simultaneously changing an incident angle of a reference light and moving a medium with a fixed angle change amount and a fixed shift amount. In this method, the reference light can be split for incidence, and then holograms in different units can be simultaneously reproduced. According to the method disclosed by the patent, a recorded hologram can be read and written in real time, and a recorded signal can be checked under a condition of satisfying a response time required by the medium.